Emery-wheel dresser.



F. THOMAS.

EMERY WHEEL DRESSER.

' APPLICATION FILED JULY 12, 1915.

Patented Mar. 7,.1916.

SECTION 8-5 V|II|I SECTION A-R rm; cum-mum rM-Nuampu ru, WASHINGTON, n. c.

FREDERICK THOMAS, or omen co, ILLINOIS.

EMERY-WHEEL DRESSER.

Specification of Letters Patent.

Patented Mar. 7, 1916.

Application filed July 12, 1915. Serial No. 39,462.

reference being had to the accompanying drawings.

This invention relates to emery wheel dressers and it has for its principal object the provision of a new and improved form of protecting device by which the eyes of the workman using the device may be properly protected against the dust and grit thrown outward from the emery wheel during a dressing operation.

It is another object of my invention to improve devices of this type in sundry details hereinafter pointed out.

The preferred means by which Ihave accomplished my objects are illustrated in the drawings and are hereinafter specifically described. 7

That which I believe to be new and desire to cover by this application is set forth in the claims.

In the drawings: Figure 1 is a top view of my improved device, with the handle I partly broken away, showing the operative parts in dotted lines; Fig. 2 is a longitudinal vertical section through the device, being taken substantially on line BB of Fig. 1, and showing diagrammatically an. emery wheel and a portion of its framework; Fig. 3 is a transverse vertical section through my improved device, being taken substantially on line A-A of Fig. 1; Fig. 4 is a view of my device as seen from the left in Fig. 2 with the cutters and the hood removed; Fig. 5 is a detail view showing the arbor upon which the cutters are mounted; and Fig. 6 is an enlarged detail showing the grip portion of the handle, partly broken away.

Referring to the several figures of the drawings in which corresponding parts are indicated by the same reference characters, B indicates the handle of my device bifurcated at one end, providing arms G and H. An arbor D is mounted in the arms G and H, the squared end portion I of said arbor being mounted in a correspondingly-shaped opening in the arm G. In order to additionally hold the arbor D against rotation in the arms GH, I have provided pins wb in the ends of the arbor resting in .screws F for further holding the arbor D firmly in position.

Loosely mounted upon the arbor D are a plurality of disks 3, 4, 5 and 6, in the construction shown two washers 7 and 8 being employed between adjacent'disks. Each of the disks 3, 4, 5 and 6 is provided with a series of teeth E upon its periphery. Inasmuch as the operation ofemery wheel dressers of this type is well understood, when applied to an emery wheel such as A in Fig. 2 with the arms G and H resting upon the framework J of the emery wheel, it is believed that it will not be necessary to go into this matter in detail herein. For the protection of the eyes of the workman from the flying particles of dust and grit, I have provided a hood or shield indicated by the numeral 1, which is adapted to be secured adjustably in position about the disks 3, 4, 5 and 6. In theconstruction shown the hood .or shield 1 is mounted upon the handle B with its lower edges slidably resting upon shoulders K provided by the arms G and H, as best shown in Fig. 4. The hoodis held in position by. means of a set-screw 2 passing through a slot 9 in the hood 1, being readily removable from the screw by reason of the provision of the enlarged opening 10.

By the provision of my adjustable hood 1, the flying particles sent outward. by the dressing operation are prevented from flying upward into the eyes of the workman. As the dressing disks 3, 4, 5 and 6 are-worn away gradually by use, the hood 1 can be moved back from time to time so as not to be brought. into contact with the emery wheel. The sides of the hood 1 which embrace the arbor D serve as an additional means for holding the arbor .D in position during the rotation of the dressing disks at the exceedingly high speed at which the device is ordinarily used.

While Iprefer tov form the framework of my device in which the steel disks are mounted in the manner illustrated in the drawings as an integral portion of the handle, it will be understood that I do not wish to restrict myself to this form of construction except as hereinafter specifically claimed.

What I claim as my invention and desire to secure by Letters Patent, is-

1. In an emery wheel dresser, the combination 'of a frame member, an arbor mounted therein, cutting devices mounted on said arbor and revoluble relative to said frame member, and a metal shield adjustably mounted upon said frame member about said disks having sides serving when in position to prevent the withdrawal of the 1 arbor.

2. In an emery wheel dresser, the combination of a frame member, an arbor mounted therein, cutting devices mounted on said arbor and revoluble relative to said frame member, and a metal shield mounted upon said frame member extending above said disks and having sides extending opposite the ends of the arbor for prevent ing the withdrawal of the arbor from the frame member, said frame member being provided with shoulders at its opposite sides adapted to be engaged by the sides of the shield for holding the shield against moving downward relative to the frame member.

In testimony whereof I sign this specification in the presence of two witnesses.

FREDERICK THOMAS. l/Vitnesses:

WILLIAM J. CONDON, P. F. MCCARTHY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

